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- <template>
- <view class="u-radio" :style="[radioStyle]">
- <view class="u-radio__icon-wrap" @tap="toggle" :class="[iconClass]" :style="[iconStyle]">
- <u-icon
- class="u-radio__icon-wrap__icon"
- name="checkbox-mark"
- :size="elIconSize"
- :color="iconColor"/>
- </view>
- <view class="u-radio__label" @tap="onClickLabel" :style="{
- fontSize: $u.addUnit(labelSize)
- }">
- <slot />
- </view>
- </view>
- </template>
-
- <script>
- /**
- * radio 单选框
- * @description 单选框用于有一个选择,用户只能选择其中一个的场景。搭配u-radio-group使用
- * @tutorial https://www.uviewui.com/components/radio.html
- * @property {String Number} icon-size 图标大小,单位rpx(默认24)
- * @property {String Number} label-size label字体大小,单位rpx(默认28)
- * @property {String Number} name radio组件的标示符
- * @property {String} shape 形状,见上方说明(默认circle)
- * @property {Boolean} disabled 是否禁用(默认false)
- * @property {Boolean} label-disabled 点击文本是否可以操作radio(默认true)
- * @property {String} active-color 选中时的颜色,如设置parent的active-color将失效
- * @event {Function} change 某个radio状态发生变化时触发(选中状态)
- * @example <u-radio :label-disabled="false">门掩黄昏,无计留春住</u-radio>
- */
- export default {
- name: "u-radio",
- props: {
- // radio的名称
- name: {
- type: [String, Number],
- default: ''
- },
- // 形状,square为方形,circle为原型
- shape: {
- type: String,
- default: ''
- },
- // 是否禁用
- disabled: {
- type: [String, Boolean],
- default: ''
- },
- // 是否禁止点击提示语选中复选框
- labelDisabled: {
- type: [String, Boolean],
- default: ''
- },
- // 选中状态下的颜色,如设置此值,将会覆盖parent的activeColor值
- activeColor: {
- type: String,
- default: ''
- },
- // 图标的大小,单位rpx
- iconSize: {
- type: [String, Number],
- default: ''
- },
- // label的字体大小,rpx单位
- labelSize: {
- type: [String, Number],
- default: ''
- },
- },
- data() {
- return {
- // 父组件的默认值,因为头条小程序不支持在computed中使用this.parent.shape的形式
- // 故只能使用如此方法
- parentData: {
- iconSize: null,
- labelDisabled: null,
- disabled: null,
- shape: null,
- activeColor: null,
- size: null,
- width: null,
- height: null,
- value: null,
- wrap: null
- }
- };
- },
- created() {
- this.parent = false;
- // 支付宝小程序不支持provide/inject,所以使用这个方法获取整个父组件,在created定义,避免循环引用
- this.updateParentData();
- this.parent.children.push(this);
- },
- computed: {
- // 是否禁用,如果父组件u-raios-group禁用的话,将会忽略子组件的配置
- elDisabled() {
- return this.disabled !== '' ? this.disabled : this.parentData.disabled !== null ? this.parentData.disabled : false;
- },
- // 是否禁用label点击
- elLabelDisabled() {
- return this.labelDisabled !== '' ? this.labelDisabled : this.parentData.labelDisabled !== null ? this.parentData.labelDisabled : false;
- },
- // 组件尺寸,对应size的值,默认值为34rpx
- elSize() {
- return this.size ? this.size : (this.parentData.size ? this.parentData.size : 34);
- },
- // 组件的勾选图标的尺寸,默认20
- elIconSize() {
- return this.iconSize ? this.iconSize : (this.parentData.iconSize ? this.parentData.iconSize : 20);
- },
- // 组件选中激活时的颜色
- elActiveColor() {
- return this.activeColor ? this.activeColor : (this.parentData.activeColor ? this.parentData.activeColor : 'primary');
- },
- // 组件的形状
- elShape() {
- return this.shape ? this.shape : (this.parentData.shape ? this.parentData.shape : 'circle');
- },
- // 设置radio的状态,要求radio的name等于parent的value时才为选中状态
- iconStyle() {
- let style = {};
- if (this.elActiveColor && this.parentData.value == this.name && !this.elDisabled) {
- style.borderColor = this.elActiveColor;
- style.backgroundColor = this.elActiveColor;
- }
- style.width = this.$u.addUnit(this.elSize);
- style.height = this.$u.addUnit(this.elSize);
- return style;
- },
- iconColor() {
- return this.name == this.parentData.value ? '#ffffff' : 'transparent';
- },
- iconClass() {
- let classes = [];
- classes.push('u-radio__icon-wrap--' + this.elShape);
- if (this.name == this.parentData.value) classes.push('u-radio__icon-wrap--checked');
- if (this.elDisabled) classes.push('u-radio__icon-wrap--disabled');
- if (this.name == this.parentData.value && this.elDisabled) classes.push(
- 'u-radio__icon-wrap--disabled--checked');
- // 支付宝小程序无法动态绑定一个数组类名,否则解析出来的结果会带有",",而导致失效
- return classes.join(' ');
- },
- radioStyle() {
- let style = {};
- if (this.parentData.width) {
- style.width = this.$u.addUnit(this.parentData.width);
- // #ifdef MP
- // 各家小程序因为它们特殊的编译结构,使用float布局
- style.float = 'left';
- // #endif
- // #ifndef MP
- // H5和APP使用flex布局
- style.flex = `0 0 ${this.$u.addUnit(this.parentData.width)}`;
- // #endif
- }
- if (this.parentData.wrap) {
- style.width = '100%';
- // #ifndef MP
- // H5和APP使用flex布局,将宽度设置100%,即可自动换行
- style.flex = '0 0 100%';
- // #endif
- }
- return style;
- }
- },
- methods: {
- updateParentData() {
- this.getParentData('u-radio-group');
- },
- onClickLabel() {
- if (!this.elLabelDisabled && !this.elDisabled) {
- this.setRadioCheckedStatus();
- }
- },
- toggle() {
- if (!this.elDisabled) {
- this.setRadioCheckedStatus();
- }
- },
- emitEvent() {
- // u-radio的name不等于父组件的v-model的值时(意味着未选中),才发出事件,避免多次点击触发事件
- if(this.parentData.value != this.name) this.$emit('change', this.name);
- },
- // 改变组件选中状态
- // 这里的改变的依据是,更改本组件的parentData.value值为本组件的name值,同时通过父组件遍历所有u-radio实例
- // 将本组件外的其他u-radio的parentData.value都设置为空(由computed计算后,都被取消选中状态),因而只剩下一个为选中状态
- setRadioCheckedStatus() {
- this.emitEvent();
- if(this.parent) {
- this.parent.setValue(this.name);
- this.parentData.value = this.name;
- }
- }
- }
- };
- </script>
-
- <style lang="scss" scoped>
- @import "../../libs/css/style.components.scss";
-
- .u-radio {
- /* #ifndef APP-NVUE */
- display: inline-flex;
- /* #endif */
- align-items: center;
- overflow: hidden;
- user-select: none;
- line-height: 1.8;
-
- &__icon-wrap {
- color: $u-content-color;
- @include vue-flex;
- flex: none;
- align-items: center;
- justify-content: center;
- box-sizing: border-box;
- width: 42rpx;
- height: 42rpx;
- color: transparent;
- text-align: center;
- transition-property: color, border-color, background-color;
- font-size: 20px;
- border: 1px solid #c8c9cc;
- transition-duration: 0.2s;
-
- /* #ifdef MP-TOUTIAO */
- // 头条小程序兼容性问题,需要设置行高为0,否则图标偏下
- &__icon {
- line-height: 0;
- }
- /* #endif */
-
- &--circle {
- border-radius: 100%;
- }
-
- &--square {
- border-radius: 3px;
- }
-
- &--checked {
- color: #fff;
- background-color: #2979ff;
- border-color: #2979ff;
- }
-
- &--disabled {
- background-color: #ebedf0;
- border-color: #c8c9cc;
- }
-
- &--disabled--checked {
- color: #c8c9cc !important;
- }
- }
-
- &__label {
- word-wrap: break-word;
- margin-left: 10rpx;
- margin-right: 24rpx;
- color: $u-content-color;
- font-size: 30rpx;
-
- &--disabled {
- color: #c8c9cc;
- }
- }
- }
- </style>
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